MCB 5SN — 2-pole, 400 V, dual-breaking capacity
The Siemens 5SN6232-8CP is a 2-pole miniature circuit breaker from the SENTRON 5SN series, rated for 400 V AC at 50 Hz. The 2-pole configuration (2 MW units wide, 36 mm) suits single-phase or two-phase branch circuits where both poles need coordinated overcurrent protection.
The 72 V DC maximum rating means it can also be used on DC control circuits within that voltage limit, though the AC rating is the primary spec for this part. The 10 000 mechanical operating cycles typical service life is standard for a DIN-rail MCB in this class — it's not a high-cycling contactor, but it will handle routine switching for decades in a panel that sees occasional breaker operation.
The solid conductor cross-section accepts up to 35 mm², which is generous for a 2-pole MCB and allows feeding through larger incoming cables before splitting to smaller branch circuits.